Synthesis of 1T-MoSe2 ultrathin nanosheets with an expanded interlayer spacing of 1.17 nm for efficient hydrogen evolution reaction
| Autor: | Meihui Wu, Chun-Sing Lee, Wen-Jing Jian, Miao Jiang, Hongtao Xue, Jun Xu, Tsz-Wai Ng, Junjun Zhang |
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| Rok vydání: | 2016 |
| Předmět: |
High concentration
Tafel equation Materials science Renewable Energy Sustainability and the Environment Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Kinetic energy 01 natural sciences 0104 chemical sciences Catalysis Metal Chemical engineering visual_art Phase (matter) visual_art.visual_art_medium General Materials Science Hydrogen evolution 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry A. 4:14949-14953 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | In this work, we report for the first time a simple solvothermal method to synthesize assembled 1T-MoSe2 nanosheets, which possess expanded (002) interlayer spacings as large as 1.17 nm with an 81% expansion as compared to that (0.646 nm) of the bulk counterpart. The 1T-MoSe2 nanosheets exhibit striking kinetic metrics for the hydrogen evolution reaction (HER) with a low onset potential of 60 mV and a small Tafel slope of 78 mV dec−1, which are better than those of the 2H-MoSe2 counterpart with a normal interlayer spacing of 0.64 nm. The outstanding electrocatalytic activity is attributed to the high concentration of the metallic 1T phase as well as the expanded interlayer distance, contributing to increasing the number and catalytic activity of the active sites. |
| Databáze: | OpenAIRE |
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